How do I know if I have a broken speaker?

[sdxtest]

I (sdxtest) will. (c316baa8-837c-4233-aae8-297faee075e3)

[sdxadmin]

I also have a Gibson, you should keep that forever (89b3b04f-e5db-4531-ae63-2abc714182db)

[sdxtest]

I (sdxtest) will. (26e11379-25b6-42d0-a9ec-865f264bf049)

[sdxadmin]

I also have a Gibson, you should keep that forever (78a80a85-1724-4783-be56-793f14a99251)

[sdxtest]

I (sdxtest) will. (73a78a34-caee-4df5-b547-3bf13de9d054)